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Power supply device and control method for power supply device

A technology of power supply device and control terminal, applied in emergency protection circuit device, measurement device, control/regulation system, etc., can solve the problems of deterioration of detection accuracy of current value iL, deterioration of calculation accuracy of output current value, increase of error of mathematical formula, etc.

Active Publication Date: 2021-05-11
FDK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the capacitance value Cf becomes large, the loss increases. Therefore, although the resistance value Rf is set to be large, in this case, there is a problem that the error with the mathematical formula of the potential difference vc=RL·iL increases. , the detection accuracy of the current value iL deteriorates, and the calculation accuracy of the output current value flowing through the load deteriorates

Method used

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  • Power supply device and control method for power supply device
  • Power supply device and control method for power supply device
  • Power supply device and control method for power supply device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0044] figure 1 It is a figure which shows an example of the power supply apparatus of 1st Embodiment.

[0045] The power supply device 10 converts the magnitude of the input voltage supplied from the power supply 20, and supplies it to the load 30 having the load resistance 30a.

[0046] The power supply device 10 has switching elements 11 , 12 , an inductance element 13 a , a current detection circuit 14 , a capacitance element 15 , a control circuit 16 , a gate driver 17 , and a time constant circuit 18 .

[0047] The switching element 11 switches the current input from the input terminal IN of the power supply device 10 . The switching element 12 switches between the ground potential and the output of the switching element 11 . The switching elements 11 and 12 are, for example, n-channel MOSFETs (Metal Oxide Semiconductor Field Effect Transistor: Metal Oxide Semiconductor Field Effect Transistors) or the like.

[0048] The switching elements 11 and 12 each have two term...

no. 2 Embodiment approach

[0213]Hereinafter, a power supply device according to the second embodiment will be described. In the power supply device of the second embodiment, the following inductance element is used instead of Figure 4 , Figure 5 Except for the planar inductance element 13a shown, it is the same as the power supply device 1 of the first embodiment.

[0214] Figure 15 It is a figure which shows an example of the inductance element of the power supply apparatus of 2nd Embodiment.

[0215] The inductance element 80 in the power supply device of the second embodiment is a coil in which a winding 82 is wound around a core material 81 such as a ferrite core. One end 82a of the winding 82 is connected with figure 1 The switching elements 11, 12 shown are connected, and the other end 82b of the winding 82 is connected to the figure 1 The output terminals shown are OUT connections. In this inductance element 80 , the detection tap 83 is provided at a position where the number of turns i...

no. 3 Embodiment approach

[0221] Hereinafter, a power supply device according to a third embodiment will be described. In the power supply device of the third embodiment, the following two inductance elements are used instead of Figure 4 , Figure 5 Except for the planar inductance element 13a shown, it is the same as the power supply device 1 of the first embodiment.

[0222] Figure 16 It is a figure which shows an example of the inductance element of the power supply apparatus of 3rd Embodiment.

[0223] The power supply device of the third embodiment has two inductance elements 91 and 92 connected in series. exist Figure 16 In , the equivalent series resistance 93 of the inductance element 91 and the equivalent series resistance 94 of the inductance element 92 are also shown.

[0224] One end of the inductance element 91 is connected with figure 1 The switching elements 11 and 12 shown are connected, and the other end is connected to one end of the inductance element 92 via an equivalent se...

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Abstract

Calculates the output current value flowing through the load with good accuracy. The current detection circuit (14) included in the power supply device (10) detects the current flowing through the inductance element from the detection tap (13b) of the inductance element (13a) connected between the output terminal (OUT) and the output of the switching element (11). (13a), the control circuit (16) of the power supply device (10) controls the control terminal of the switching element (11) and the control terminal of the switching element (12), and according to the current detection circuit (14) The detected current value is used to calculate the output current value flowing through the load (30).

Description

technical field [0001] The invention relates to a power supply device and a control method of the power supply device. Background technique [0002] In a communication base station, an information processing device (server, etc.), or a processor module, etc., a power supply device (switching power supply device) including a switching element is used. Conventionally, a technique of digitally controlling a power supply device using a control circuit such as a microcontroller has been performed. There are advantages in that, by performing digital control, the switching timing of the switching element can be precisely controlled, and various functions can be realized by software. [0003] In a power supply device using a digital control method, the control circuit obtains the output current value flowing through the load by calculation, and uses it to control the output voltage value and prevent overcurrent. The output current value can be calculated using the current value fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155
CPCG01R1/203G01R19/16538G05F1/10H02M1/32H02M3/158H02M1/0009H02M1/0064H02H7/1213H02M3/156G01R19/0092H02M1/14
Inventor 米泽游及川淳永岛荣治中岛善康
Owner FDK CORP